Question
Which disease or disorder is the result of having an extra chromosome?
- Cystic Fibrosis
- Hemophilia
- Colorblindness
- Down Syndrome
Hint:
The disorder causes trisomy of chromosome 21.
The correct answer is: Down Syndrome
Down syndrome or chromosome 21 trisomy is a type of chromosomal genetic disorder. Chromosomal genetic disorder refers to change in the structure of a chromosome due to addition or deletion of chromosomal segments during cell division.
In Down syndrome, the chromosome 21 will have an additional chromosome due to improper division during meiosis. The individual will posses problems in the nervous system and lack intellectual skills.
- Down syndrome is also termed as trisomy 21
- Individuals posses an extra chromosome at 21 position
- Trisomy 21 is caused due to improper separation of chromosomes during meiosis
- Cystic fibrosis is an autosomal recessive disorder
- Color blindness is an autosomal dominant disorder
- Hemophilia is a monogenic genetic disorder
Related Questions to study
Which disease or disorder is caused by the inheritance of two mutated alleles?
- Cystic fibrosis results in breathing disorder of the affected individual due to increased thick mucus secretion
- The disorder is caused due to alteration in CFRT gene
- It is a type of autosomal recessive disorder, having both copies of gene altered in a cell
- Other disorders mentioned are not autosomal recessive in nature
Which disease or disorder is caused by the inheritance of two mutated alleles?
- Cystic fibrosis results in breathing disorder of the affected individual due to increased thick mucus secretion
- The disorder is caused due to alteration in CFRT gene
- It is a type of autosomal recessive disorder, having both copies of gene altered in a cell
- Other disorders mentioned are not autosomal recessive in nature
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When does chromosomal crossover occur?
Chromosomal crossover is the natural pairing up and exchanging of genetic material between
Chromosomal crossover is the natural pairing up and exchanging of genetic material between
Which of the following does not cause variation?
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What is the structural and functional unit of heredity?
What is the structural and functional unit of heredity?
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If two vectors A and B with magnitude a and b respectively are given and the angle between them is θ Then the magnitude of the Resultant of A and B is R = 
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